Grinding and lapping machine



Apr. 16,1923. v

F; c. WKEAV E GRINDING AND LAPPING MACHINE Filed May 10, 1922 5sheets-sheet 1 G30: an

Apr. 10, 1923. 1,451,089

F. C. WEAVER v GRINDING AND LAPPING MACHINE Filed May 10, 1922 5sheets-sheet 2 5 24 2.! 2 fie 9 J r 2 g5 l I v 2 29 31mm"? oz Qfiti)attain",

Apr. 10, 1923. 1,451,089

F. c. WEAVER GRINDING AND LAPPING MACHINE 5 sheets-sheet 5 Filed May 10,1922 311001 H'oa Patented Apr. 10, 1923.

FLOYD C. WEAVER, OF WASHINGTON, DISTRICT OF COITUMBIA.

/ GRINDING AND LAPPING MACHINE.

Application filed May 10,

To all'whom it may concern:

Be it known that I, FLOYD G. WEAVER, a citizen of the United States,residing at Washington, District of Columbia, haveinvented certainnew'and useful Improvements in a Grinding and Lapping Machine,of whichthe following is a specification, reference being had therein to theaccompanyin drawings.

he object of this invention is to provide a driving mechanism for movinga lapping plate relative to a work carrying plate in a desired orbit andfor varying the orbit and the position of the orbit in respect to the 16work carrying plate and thereby cause the lapping plate to followparticular processes of operation based upon the specific physicalbehavior of the materials being worked u on. With these'and otherobjects in view, my

invention "comprises certain novel combinations, constructions andarrangements of parts as will be hereinafterdescribed, illustrated inthe accompanying drawings, and '25 more particularly pointed out in theappended claims.

In'the drawings: Figure l'is a plan view of-the lapping machine showingthe relative arrangement a0 of the lapping plate and work carrying plateto the driving mechanism and its control features." I v Figure 2 is avertical section of the lapping machine shown in Figure 1 taken alongthe line 22 in the direction of the arrows. This view shows the relativepositions of the lapping plate and the work carrying plates to thedriving mechanisms.

. Figure'3 is a vertical sectionof the lapping machine shown in Figure 1taken along the line '3--3.-in;the direction indicated by the arrows.This vie'w'shows the main driving shafts.'

Figure :4 is a vertical section of the lapping machine'shown in Figure 1taken along the line 44 inthe direction indicated by the arrows. Thisview shows the driving eccentric plate for operating the stroking pinactuating the lapping plate. I

' Figure 5 is 'a' vertlcal section of the lapping machine shown inFigure 1 taken along the line 55 in the direction indicated by thearrows. This view shows the second driving eccentric plate for operatingthe str king 'pinwtuating the l pping plate,

' carries 1922. Scrial N0. 559,882.

also showing the manner of support of bearmg and driving mechanismessential for'adjustment of the eccentric axis relative to axissupporting work carrying platewhen varying position of path of the pinactuating the lagping plate.

gure 6 is a section of the eccentric plates 'showlng the essentialdetails of construction which enable the adjustments to be made whichare necessary in obtaining the proper movement of the pin actuatingthelapping plate over the work carrying plate.

Referring to Figure 1, the lapping plate 2 is actuated by the pin 3 overthe work carrying plate 1. The pin 3 is securely clamped in the blockforming the end of the bar 20. At the opposite end of bar 20 is thehinge fork coupling to the bearing collar 19 fitting upon the eccentricdriving pin 18. .Fitting in and 'upon bar 20 is the ball socket bearingblock 21 capable of being clamped firmly in adjustment along the slotinbar 20 by the screws 22. T1115 bearing block 21- receives the ballendof the bar 23, clamped securelyin adjustment in the bar 25 by the screws24. The outer end of bar 25 carries a hinge fork coupling to the bearingcollar 27 fitting upon the eccentric driving pin 26. Thus the pin 3 isactuated by the combination of the motions of the eccentric driving 85pins 18 and 26.

Referring to Figures 2, 3 and 4 in conjunction with Figure 1, thedriving'pin 26 is secured inadjustment in the slot 29 of the eccentricplate 28 which in turn'is secured firmly to the vertical axis 42.Securely attached to axis 42 is the worm wheel or gear 43 in mesh withthe driving worm or pinion 30 on drivingshaft 31. This driving shaft 31carries the main driving gear 32 in mesh with the main driving pinion36' connected by the clutch 37 operated by the lev'er 38 to the maindrive shaft 35 which carries the power pulley 34. The drive shaft 31also the bevel gear 33 in mesh with bevel gear 12 securely attached todrive shaft/'11. This drive shaft 11 carries the worm or gear pinion 13free to be moved along its "axis yet positively driven by thespline-keyway 1 4.

Referrin to Figure 5 in connection with Figure 1 the worm or pinion 13is secured between the arms of the yoke 15, forming also a bearing fordrive shaft 11, as .wella's the bearing for axis 49 which arries thefirmly secured eccentric plate 1,6,v "This axis carries the threadedscrew bearing for the screw shaft 39-which hasat its outer end the handWheel 450i The yoke 15 is free to'sli'de along the guides or ways 47upon the opera-f tion of hand wheel 40. Thus the axis 49 and theeccentric plate 16 mounted upon the yoke 15 may be moved at will along adirection pana llelto axis of driving shaft 1 1 by the operation ofihandwheeb 40. The driving shacttiil isconne'cted at will or" operator :toshaft G-byclutch 8' actuated by'lever 9; This :driving shaftt carriesthe worm or gear pinion 5 and the hand wheel Referri'ngto Figure "2 inconjunction with Figure ltheworm or pinion V5 is meshed with. the wormnvhe el or gear a secured' upon the axis 45 Whicliis in turn firmlysecured to:.work carrying plate 1. Thus, at the will of the operator,axis- 49 and eccentric plate 16 can beshiftedi by hand wheel lO towardor away from theawork' ca-rrying plate 1 and axis-4:5, at-all stages 'ofthe machine operatiiionc, Also, bywdisengaging shaft 6 from sha ft =11by clutch 8, the work, carrying plate? I: is. then free to be operatedby hand wheel.

. Referringto Figure 6" in conjunction withLFigurel, the; eccentricdriving plates 16 and-28am detailed in such a manner that the relativeangular. relationvof the slots carrying thedriving pins- 18 and 26,respecti'vely, may beadjusted atwill. Thedriving,;a xis- 55;isfirmly.secured to bearing plate 54;. The;.'p'latea 52, carrying the'slot ford-rivingfpin, 26A3I1d' its securing nut 50, isq lclamped; for anyrelativeangular ad justme'ntby screws 51,; drawing the ring'53 againstthe flange of 54, clam'ping'it' firmly to-.the-under face-.oii-52; f

Thus: the pin 3 actuating; the lapping plate 2 ;lS driven bythetwoeccentric plates 28, and 1 6 in a prescribed path, andwhich path-fis shi'fted, at will by operating, hand wheela40ealong, any portion of thework carrying plate. Also by opera-ting the hand Wheel 'Z-in'conjunction with the hand wheel 4Q"thej1a'pp ing, effort of plate 2. islocalized to: any ,desiredportion of 'the work carry- I While Ihave-described the, preferred embodiment; of; invention, and haveillustrated the same in the accompanying, drawings certain minorchangesor alterations mayappear to' one skilled in the art to which, thisinvention relates, during the extensive-manufacture ofv the same. and I,theret'org reserve the; rightto make such alterations or changes asshall; fairlycfall within the scope of; the appended claims inp entionihalving-been described, w e -w cl imed v -1 a 1. ,lll'fa grinding andlapping machine-of the character described, the combination of a work?carrying; plate, means for supportingsaid work carrying plate, a lappingplate positioned above said work carrying plate, a pinengaging saidlapping plate, a bar connected to said' p111, means" for oscillating aworkcarryingplate', means for support ing said work carrying plate,alapping plate positioned above said work carrying plate, a pin"engaging said lapping plate, .a: bar connected to said stroking pin,means. for oscillatingesaid'i bar, an eccentricxplate carried adjacent-the rear endof' said: ban, means connecting 's'aidl plate-to saidib'a-r', means; for driving said .plate',; whei 'ehy said barwi'll". beshifted for stroking said: lapping platerin :a variable; manner andmeans; tor bodilyfladvancing or retracting said eccentric plate, wherebysaid. lapping plate wi'l'lfibercaused tooperate 1 over certain portionsoi the, work carrying: plate as desil"ed,1:aszalrd for the: purposessettorth-p 3. Inia grinding; and ,lappingQmachine of the characterdescribed, the combination of a work carrying plate,meansyfor-su'pponting said work carrying plate-,}a lapping platepositioned above.- SEl/ldl work; carrying plate, a pin engagingsaidlappingwplate', ammon- DGC tBClitO SQ ld pin,.means,tor os cillati'ngf said bar, an eccentric: platecarriediadjfacen'ti the rear endof said bar, means connectingsaid pla'teto saidbar, means torardriving'said plate, and means, for bodily moving said plate: andv saidwdrivingmeans; including? a manually operatedscrew sha-iftuv a Y 4, 'Ina-gri-nding and lappinggmachineof the character: described, thecombination-of a work carrying; plate, meansforvsuprportingfsaidwork-carrying plate; a lapping plate positioned. above: said work;carrying plate, a pinengaging saidalappings plate,- a hair connected tosaid pin, means for oscillating said bat, an axis: having agear.thereon, an eccentrio plate: supported upon said" axis, means connectingsaid bar to saideccentriczplaltle, a drive shaft having a .worm keyedthereon and slidable" therealongi and engaging said gear, and meanstorshifting said ax-is and said worm, asand-iforthe; purposes setfdrth.

5L In: a grinding and 1 lapping; machine! of the, character ,described,thecombination; or

a;work carrying plate, means forqsuppolzt-v I ng saidtworkcarryingfiplateg alappingiplate positioned above saidwork.-carryingplataaa pin engaging said lapping plate, a bar connectedto said pin, means for oscillating said bar, an axis having a gearthereon, an eccentric plate supported upon said axis, means connectingsaid bar to said eccentric plate, a drive shaft havin a worm keyedthereon and slidable therezfiong and engaging said gear, a movable yokemember engaging said axis and said Worm, and manu ally operated meansfor holding said yoke member in an adjusted set position, as and for thepurposes set forth.

6. In a grinding and lapping machine of the character described, thecombination of a work carrying plate, means for supporting said Workcarrying plate, a lapping plate positioned above said work carryingplate, a pin engaging said lapping plate, a bar connected to said pin,means for oscillating said bar, an axis having a gear thereon, aneccentric plate supported upon said axis,

means connecting said bar to said eccentric plate, a drive shaft havinga worm keyed thereon and slidable therealong and engaging said gear, amovable yoke member engaging said axis and said worm, and a manuallyoperated screw shaft engaging said yoke member, whereby said shaft maybe turned for adjusting said yoke member and retaining the same in anadjusted position, as and for the purposes set forth.

7. In a grinding and lapping machine of the character described, thecombination of a work carrying plate, means for supporting said workcarrying plate, a lapping plate positioned above said work carryingplate, a pin engaging said lapping plate, a bar connected to said pin,means for oscillating said bar, an axis having a gear thereon, aneccentric plate supported upon said axis, means connecting said bar tosaid eccentric plate, a drive shaft having a worm keyed thereon andslidable therealong and engagingsaid gear, a pair of parallel slidesextending upon opposite sides of said axis, a yoke member movable alongsaid slides and having a hub surrounding said axis and spaced armsengaging the ends of said worm, said yoke member also having a bearing,and a manually operated screw shaft engaging said bearing, turned forshifting and then retaining in an adjusted position said axis and saidworm, as and for the purposes set forth.

In testimony whereof I hereunto afiix my signature.

FLOYD C. WEAVER.

whereby the shaft may be

